ЛицаНаФигури-FUN

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Speech.Synthesis;
namespace ЛицаНаФигури
{
    class Program
    {
        static void Main(string[] args)
        {

            string square;
            string rectangle;
            string circle;
            string triangle;
            double area;

            Console.ForegroundColor = ConsoleColor.Magenta;
            SpeechSynthesizer synth = new SpeechSynthesizer();
            synth.Speak("Welcome to Iskren Mirev program version one point O");
            synth.Speak("This is the personal calculator of SoftUni");


            while (true)
            {
                Console.ForegroundColor = ConsoleColor.Magenta;
                Console.WriteLine("Please type figure to calculate the area: ");
                Console.Write("Example (square , rectangle , circle , triangle) : ");
                synth.Speak("Please type figure to calculate the area " +
                    "Example (square , rectangle , circle , triangle)");
                string user = Console.ReadLine();


                if (user == "square")
                {
                    Console.Write("Pleace enter lenght: ");
                    synth.Speak("Pleace enter lenght");
                    double a1 = double.Parse(Console.ReadLine());
                    area = Math.Round((a1 * a1), 3);
                    Console.ForegroundColor = ConsoleColor.Green;
                    Console.WriteLine("area: " + area);
                    string a = string.Format("The area of the square is {0}", area);
                    synth.Speak(a);
                }
                else if (user == "rectangle")
                {
                    Console.Write("Pleace enter lenght A: ");
                    synth.Speak("Pleace enter lenght A");
                    double a1 = double.Parse(Console.ReadLine());
                    Console.Write("Pleace enter lenght B: ");
                    synth.Speak("Pleace enter lenght B");
                    double a2 = double.Parse(Console.ReadLine());
                    area = Math.Round((a1 * a2), 3);
                    Console.ForegroundColor = ConsoleColor.Green;
                    Console.WriteLine("area: " + area);
                    string b = string.Format("The area of the rectangle is {0}", area);
                    synth.Speak(b);
                }
                else if (user == "circle")
                {
                    Console.Write("Pleace enter radius: ");
                    synth.Speak("Pleace enter radius");
                    double a1 = double.Parse(Console.ReadLine());
                    area = Math.Round(((a1 * a1) * Math.PI), 3);
                    Console.ForegroundColor = ConsoleColor.Green;
                    Console.WriteLine("area: " + area);
                    string c = string.Format("The area of the circle is {0}", area);
                    synth.Speak(c);
                }
                else if (user == "triangle")
                {
                    Console.Write("Pleace enter lenght: ");
                    synth.Speak("Pleace enter lenght");
                    double a1 = double.Parse(Console.ReadLine());
                    Console.Write("Pleace enter the length of the height: ");
                    synth.Speak("Pleace enter the length of the height");
                    double a2 = double.Parse(Console.ReadLine());
                    area = Math.Round(((a1 * a2) / 2.0), 3);
                    Console.ForegroundColor = ConsoleColor.Green;
                    Console.WriteLine("area: " + area);
                    string d = string.Format("The area of the triangle is {0}", area);
                    synth.Speak(d);
                }
                synth.Speak("Iskren Mirev wishes you a pleasant day");
            }
        }
    }
}